Screen



Jan. 24, 1933. E; E. PRSONAG SCREEN Filed April 6, 1951'. 2 sheets-sheet 1 INVENTOR maf/. www

l Jan. 24, 1933.

E. E. PARsoNAGE `1,895,341

SCREEN Filed April 6, 1931 2 Sheets-Sheet 2 .EEParsonae v 'h1-canna Patented Jan.` 24, 1933 APATENTl OFFICE reason'Aan,` oF OAKLAND CITY, INDIANA SCREEN Application filed April 6, 1231. Serial No. 528,158.

My present invention has reference to a coal screen designed for use in coal mine tipples, and my object is the provision of a screen for this purpose, that includes a number of screen platessecured upon the angle sides of end members or heads which are centrally journaled on shafts that pass transversely holding the turned plates in horizontal aline- 1 ment, and whereby shaker or vibratory screens may screen coal of different size without necessitating the shutting down of the screening plant and the loss of time incident to the removal of screens fixed on the screen box and replacing such screens with other screen plates to screen other sizes of coal.

The invention will be fully and comprehensively understood from a consideration of .the following detailed description when read in connection with the accompanying drawings which form part of the application, with the understanding, however, that the improvement is capable of extended applicam tion and is not confined to the exact showing of the drawings nor to the precise construction described and, therefore, such changes and modificati ons may be made therefrom as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claim.

In the drawings:

Figure lis a top plan view of the improvement, the screen box being in section;

Figure 2 is a side elevation of the screen box with parts broken away and parts in section.

Figure 3 is a transverse sectional view approximately on the line 3 3 of Figure 2.

Figure 4 is a sectional view approximately on the line fl- 4: of Figure 5.

Figure 5 is a sectional view approximately on the line 5-5 of Figure 4.

struction. p ldinally. alining transversely arranged round openings 2 therethroughxand these openings I The screen box l.is Vindicated in the drawmgs'by the numeral 1 andis of the usual con- The box has series of longituare isurroundedfby bosses 3. There are passed through the openings2-shafts4 and these "shaftsmay be and preferably are connected to the'agitating mechanism for the screen. ,Arranged in the boxl, at the sides thereof, there are the end plates or-heads 5 of the im- :provement` Y The plates 5 are provided with` central Vopenings that are surrounded by bosses 4and through which openings the shafts Llpass.V `Thus the plates or heads 5 are revolubly mounted on the shafts 4.

In the showing of the drawings the heads or plates. 5 are in the nature of triangular members with their points cut-away*` The edgesfor ends of the members 5 are formed ywith laterally/i extending-fianges- 6, the` same lbeing provided preferably byriveting.-` angle .plates 7 on. the .opposite faces of the'members 5,. y There is riveted or otherwise rigidlyv securedto the laterally extending or widened edges of the members 5 plates 8,`respeotively. All of these plates are of the same width and eachof the plates lis provided with series ofl apertures 9. The apertures, however, on the respective plates vary in size or area, but

Ithose on the cooperating plates are of the same sizes .Inward fof the cut-away points of the triangular members 5, whose edges for distinction are indicated by the --numeral 10, the plates. are provided with round openings 11, each of which is-surrounded by a boss` 12. The sides ofthe box l. are provided `witha seriesof spaced apertures, three in number, twofof which being disposed in longitudinal alinement above the openings 2 and the other directly below thel saidV openings'2 and these openings are Vdesigned tov vregister with the openings 11 in the end. members 5v for, the screenplates. The openings in the sides of the box are Vsurrounded by bosses 13, and through these openings there are passed pins 'liwhich' alsoventer the openings'll. The pins are held positioned through the medium of cotter pins 'or like removable elements 15 100 and obviously avoids a great loss of time which is required to remove the ordinary screen plates and to replace the samewith other screenplates.- The device isalso, it will be' noted, ofan extremely simple nature.

v Between they sides ofthe box 1 there are l'whose central portionsV depend into the box but whose outer portion or head is ar- 1,s95,341 Y j p Y z; Y

by bosses, headed pins passed through said alining openings to hold the screens from turning, removable means for securlng the ins in the openings, and T-shaped braces getween the sides of the box having their upper and widened portions in a line with'the horizontally arranged screen plates and arranged between the confronting cut-away portions of the horizontally disposed screen Plates and at the outer cut-away portions of n the said screenplates. f

EDWARD E. PARSONAGE.

fixedy substantially Tv-'s'haped brace members ranged in a line with the outer faces of the Y.

screen plates 8i The brace members 16 are alsov disposed opposite the edges 10 ofthe end platesor 4.heads of the screens,yperrnitting 'the screens to revolve therethrough. The heads ofthe members 10 prevent the passage iof coal between the adjacent and cooperating screens. Y

While I have illustrated and described my inventionv in connectionv with the shaker screen for use in coal mine tipples, itis to be understood that the same maybe connected with a'vibrating or other agitating means and that the improvement is not necessarily restricted as a. screen for coal but may be employed with equal eiiiciency for screening cereals and other materials.

If desired, and as disclosed -by Figure 3 of vthe drawings, reinforcing triangular central "plates 17 maybe also mounted on the shafts 4 'for more effectively supporting the screen plates 8.

Having described the invention, I claim: In a device for the purpose set forth, a

screen box having alining transverse shafts journaled therethrough, screens in the box centrally journaled ony the respective shafts, each screen comprising end members which are oftriangular formation but which have i' their points cut-away, and their edges except v vat the cut-away portions thereof widened laterally, each of said members, inward of the cut-away portions having an 'opening' surroundedbya boss, plates fixedly secured on thewidened edges of the members, and each of'said plates havinga. series of apertures therethrough-'and ythe apertures on the re spectivefplates varying in-area, the sides of the box having openings therethrough adapted toaline with the openings in the endmembers of the screen when the screens are turned v on their shafts to' bring certain of their apertured plates uppermost andA in horizontal ahnement," said" openings being surrounded 

